After six deaths in as many months an Interpol agent by the name of "Inspector Frank Dorin" (Adrian Hoven) is sent to a remote village somewhere in Eastern Europe to investigate. When he gets there he finds that all six deaths were to women between the ages of 18 to 22 and that when they occurred all of the electricity had also gone out for an hour or so. To make matters even worse, the attractive hotel maid by the name of "Maria" (Erika Remberg) is killed that very night in the room next to him and Inspector Dorin is immediately suspected of her murder. Coincidentally, six months earlier, a reclusive scientist named "Professor von Adelsberg" (Wolfgang Preiss) has moved into a nearby castle and--along with the help of his pretty assistant "Karin Schumann" (Karin Field)--is conducting experiments which he insists must be kept secret for the time being. Now, although I wasn't honestly expecting too much from this movie, I must admit that it had a decent amount of mystery to keep my interest for the most part. Likewise, although it is filmed in black-and-white, the director (Akos Rathonyi) took full advantage of it by using shadows and other techniques to create a dark atmosphere. On the flip side, however, the story itself had a couple of unexplained issues and the script was especially bland. I should note, however, that the film I saw was dubbed from German to English and this could possibly explain the rather basic dialogue. Be that as it may, although this was certainly not a great horror film by any means, it managed to pass the time fairly well and for that reason I have rated it accordingly. Average.